Here is a summary of the tips, but check out Stephen’s post to see them in action:

You don’t need to select a line to copy or delete it, use CTRL-c

You can add a namespace automatically by pressing CTRL-.

Never create properties by hand

You can remove and sort unnecessary using statements

Use CTRL-k+c to comment out code

You can close all documents except the current one

You can open a database by double-clicking the database file in App_Data

You can copy a file or folder into a project by dragging and dropping

Use CTRL-SPACE to perform statement completion

Add new items by pressing CTRL-N or CTRL-SHIFT+A

You don’t need to type file extensions when adding a file

Reading the comments in this post is worth the time as well with some other useful tips:

CTRL-x to delete the current line.

CTRL-r+e to encapsulate a class variable into a property.

Another source of shortcuts is the Visual C# 2008 Poster from Microsoft, a PDF cheat sheet for magical key bindings. I also use ReSharper (R#) which has many keyboard shortcuts and it maps to some of the key bindings used by Visual Studio to supplement the features, which is nice.